Hellacious
Hellacious adjective - Requiring considerable physical or mental effort.
Usage example: the pioneers survived a particularly hellacious river crossing with their covered wagon barely in one piece
Stiff and hellacious are semantically related. In some cases you can use "Stiff" instead an adjective "Hellacious".
Stiff
Stiff adjective - Requiring considerable physical or mental effort.
Usage example: we'll have a stiff climb to actually reach the summit
Hellacious and stiff are semantically related. Sometimes you can use "Hellacious" instead an adjective "Stiff".
Mutual synonyms
Cite this Source
Stiff and Hellacious. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/hellacious/stiff
Hellacious & Stiff. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/hellacious/stiff>.
Stiff or Hellacious. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/hellacious/stiff.
Google Ngram Viewer shows how "hellacious" and "stiff" have occurred on timeline